Thanks also for making offline access a high priority. However you decide to implement the feature, please keep it as cross-platform as possible! It seems like there are many users on all platforms including Windows, Mac, and Linux.

An Adobe AIR program (or similar) to add and manage Tasks, Subtasks and Folders offline and sync them online would also be great so that we don't even need the browser open when offline.

you could try Mozilla's Prism, and also an app called Bubbles for an interface free browser.

Maybe I am missing something, but neither of these provide offline sync. I tried both Prism and Bubbles, and neither one let me add a task while my computer was unplugged from the network. So an offline sync feature is still important for people who use laptops or whose Internet connection sometimes goes down.

In addition to Prism and Bubbles, there is a very nice Adobe AIR app that uses the slim version of Toodledo. See http://www.toodledo.com/foru ms/7/356/-1568/toodledo-air-app.html. The nice thing about this is that it runs on Macintoshin as well as Windows. Presumably it will run under Linux too. However, the app is really unnecessary with OSX because the very nice Toodledo dashboard widget does the same thing.